Question
a ball thrown vertically from the ground level hits the ground after 4secs.calculatethe maximumheight it reachedduringit's journey.(g=10m/s2)
Answers
Ms. Sue
Gee! I wish I could take a class called "Better Days!"
well g is closer to 9.81 but I will play along.
I like to split this in two.
It will take two seconds to reach max height
at max height, v = 0
but
v = Vi - g t
so at the top
0 = Vi - 10 t or
Vi = 10 (2) = 20 m/s
h = Vi t - (g/2) t^2
h = 20 * 2 - 5(4)
= 20 meters
I like to split this in two.
It will take two seconds to reach max height
at max height, v = 0
but
v = Vi - g t
so at the top
0 = Vi - 10 t or
Vi = 10 (2) = 20 m/s
h = Vi t - (g/2) t^2
h = 20 * 2 - 5(4)
= 20 meters